Sewing-machine shuttle



(No Model?) W. R. PARSONS SEWING *MAGHINE SHUTTLE. No. 254,040. I Patented-Feb. 21,1882.

N. PETERS. FholmLflhographar. wuhin ton. 11C.

UNITED STATES PATENT OFFICE.

WINSLOW R. PARSONS, OF WATERLOO, IOWA.

SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 254,040, dated February 21, 1882 I Application filed December 19, 1881. (No model.)

To all whom it may concern:

Be it knownthat I, WnvsLow R. PARSONS, of Waterloo, Iowa, have invented a new and useful Improvement in Sewing-Machine Shuttles, of which the following is a clear, fall, and

exact description, reference being bad to the accompanying drawings, making a part of this specification, in which Figure 1 shows an enlarged plan view of the under side of the top of the shuttle. Fig. 2 shows the same with the spring detached. Fig. 3 represents the detached spring with its arm. Fig. 4 is a section on the line a m of Fig. 1. Fig. 5 is a side view.

. To enable others skilled in the art to make and use my invention, I will proceed to describe the exact manner in which I have carried it out.

This invention relates to sewing-machine shuttles, and the object of the same is to facilitate the threading of the shuttle and to provide means whereby the tension may be increased or diminished without removing the shuttle from the machine, and also to secure a more even and smooth uniform tension without breaking or wearing away the thread,and in which all sizes of threads can be used without change of tension; and my invention consists in the devices hereinafter explained and claimed.

In the drawings,A represents the unhinged top of a shuttle'with my device attached. This top is provided with the hole a for the reception of the adjusting-screw B, to be hereinafter described. Near the rear end of the top is another small hole, b, for the reception of the bent loose end of the tapering finger b.

Extending down from a point near the opposite end of the cover is a pin, O, which fits loosely in a hole, 0, through the front end of the spring D. The spring D is slotted, as shown at d 01, so as to leave the points d and d, and these points are slightly bent, so as to rest in depressions e 6, made in the under face of the lid, whereby the shuttle is prevented from unthreadin g. The adjusting-screw B has its head rounded and countersunk into the lower face of the spring D, while the point of screw exposed on the outside of the lid is recessed to receive the screw-driver. by which the screw is loosened or tightened to adjust the spiing and the tension without removing the shuttle from the machine. The rear end, 6 of the spring 1) is bent to a short curve say about one-sixteenth of an inch-and this curve rests against the lid of the shuttle, so that the spring itself, at the point where the adjusting-screw holds it, is not drawn against the lid; but; this construction permits the front end of the spring which clamps the thread to lie close against the lid, whereby the tension is easily regulated by means of the screw.

To thread my improved shuttle, insert the end of the thread sidewise under the point d and draw it along around thepin U and under the point d. Then close the lid,and the shuttle is ready for use, the bobbin having first been properly placed'in the shuttle.

It will be observed that the distance which the tension-spring clamps the thread-namely, from the slot d, around the smooth pin 0, and to the slot dis about twice the usual distance, thus giving a smoother and more even tension; also, the point from which the thread is distributed from the bobbin being midway of the bobbin, the thread draws with equal ease from either end in my improved shuttle.

The lid is hinged at the forward end.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is

In a sewing-machine shuttle having its lid hinged at its forward end, the lid A, provided with the adjusting-screw hole a, depressions e 0, hole I), and the pin 0, in combination with the tension-spring D, provided with the slots (1 (1, points (1 d the finger b, hole 0, bent end e, and the adjusting-screw B, all constructed and combined to operate substantially as and for the purpose set forth.

WINSLOW RANDALL PARSONS. Witnesses:

MARVIN ALDRICH, WM. BLOWERS. 

